The Three Matzos

Deuteronomy 1633 commands that you shall not eat leavened bread with the Passover lamb. Hummets is defined as a combination of certain kinds of grain with water left to sit and ferment before baking. The word hummets is related to the word for sour. You can speed up the fermentation process by adding yeast or as they did in ancient times mix in a little piece of already fermented dough.